CN104143606A - Display device with integrated solar panel and manufacturing method thereof - Google Patents

Abstract

The invention discloses a solar panel integrated on a display unit, a display device integrated with the solar panel and a preparation method thereof. The solar cell panel integrated on the display unit of the present invention includes a photoelectric material layer with red-green-blue color, wherein the red unit, green unit and blue unit are arranged in the same way as the pixel array in the display unit Arranged in a corresponding manner, and one or two of the red unit, green unit and blue unit are made of photoelectrically active materials. The photoelectrically active material layer with red-green-blue color of the present invention can replace ordinary color filters.

Description

Display device with integrated solar panel and manufacturing method thereof

technical field

The present invention relates to the technical field of display devices, and more specifically, to a solar cell panel integrated on a display unit, a display device integrated with the solar cell panel, and a preparation method thereof.

Background technique

Mobile devices such as laptops, tablets, and mobile phones are widely used in daily life. Due to the limited capacity of the battery, the battery life of these mobile devices is greatly limited. Especially in the absence of external power supply, the batteries of these mobile devices cannot be recharged after they are exhausted.

Currently, solar cells can be used to solve the above problems. In places where there is no power supply, the external solar panel can be used to charge the mobile device so that it can continue to work. However, for mobile device users, it is very inconvenient to carry an external solar battery panel. Therefore, if the solar battery can be combined with the mobile device, the portability can be greatly improved. Currently, since the surface of most mobile devices is covered with a large display, many researchers are working on adding the solar cell layer to the display device. However, solar cell layers (including those so-called transparent solar cell layers) actually have a certain color, so disposing these solar cell layers on a display device will absorb part of visible light, thereby affecting the display effect. On the other hand, the color filter in an ordinary display device absorbs 2/3 of the backlight energy to express the corresponding color, and this part of the absorbed backlight energy will be converted into heat or other forms of energy, so that most of the backlight energy is absorbed waste.

US2010/0245731 discloses a photocell with the same size as a sub-pixel, as shown in FIG. 1 , the photocell is arranged on a pixel of a display device. The photovoltaic cell uses different photoelectric active materials to absorb light in different wavelength bands, thereby obtaining an effect similar to a color filter. However, in order to obtain the above effects, it is necessary to arrange multiple absorbing layers in the photovoltaic cell to absorb light of different wavelength bands, which is costly and complicated. In addition, since the color expressiveness of the blue and green absorbing layers is poor, in order to ensure the normal color expressiveness of the display device, an additional ordinary color filter needs to be provided in the display device.

Contents of the invention

An object of the present invention is to provide a solar cell panel integrated on the display unit, which can replace the traditional color filter, while performing color filtering, it can also absorb part of the unwanted backlight and from Ambient light entering the display device from the outside is efficiently converted into electrical energy.

Another object of the present invention is to provide a display device comprising a display unit and the solar cell panel provided by the present invention.

Another object of the present invention is to provide methods for preparing the above-mentioned solar cell panels and display devices respectively, these methods can simplify the production process of the display device integrated with solar cell panels, improve productivity and reduce defective rate.

The above object of the present invention is achieved through the following technical solutions.

A first aspect of the present invention relates to a solar cell panel integrated on a display unit, said solar cell panel comprising: a photoelectric material layer having red-green-blue colors, said photoelectric material layer comprising a red unit, a green unit and a blue unit, wherein the red unit, the green unit and the blue unit are arranged in a manner corresponding to the arrangement of the pixel array in the display unit, and one or both of the red unit, the green unit and the blue unit are composed of photoactive material.

In the present invention, the arrangement of the red unit, the green unit and the blue unit in the photoelectric material layer, that is, "the red unit, the green unit and the blue unit are arranged in a manner corresponding to the arrangement of the pixel array in the display unit", It is the same as the arrangement of red, green and blue units (sub-pixels) in traditional color filters. Due to the adoption of a red-green-blue photoelectrically active material layer with a traditional color filter structure, the solar cell panel thus obtained can function as a color filter, thereby eliminating the color filter layer in the display device, Furthermore, the process is simplified to save cost; and while performing color filtering, part of the absorbed unnecessary backlight and ambient light entering the display device from the outside can be converted into electrical energy.

Preferably, the present invention provides a solar cell panel integrated on a display unit, said solar cell panel comprising: a photoelectric material layer having red-green-blue colors, said photoelectric material layer comprising a red unit, a green unit and The blue unit, wherein the red unit, the green unit and the blue unit are arranged in a manner corresponding to the arrangement of the pixel array in the display unit, and the red unit is made of a photoelectrically active material; a first transparent base layer and a second transparent A base layer, the first transparent base layer and the second transparent base layer are respectively arranged on both sides of the photoelectric material layer; a transparent electrode layer, the transparent electrode layer is arranged between the first transparent base layer and the photoelectric material layer Between; a hole conduction layer, the hole conduction layer is arranged between the second transparent base layer and the photoelectric material layer.

Preferably, the solar cell panel may further include a metal grid layer, the metal grid layer is arranged between the hole conduction layer and the second transparent base layer, and is connected with the red unit, the green unit and the corresponding to the boundaries between the blue cells.

A second aspect of the present invention relates to a display device comprising a display unit and the above-mentioned solar cell panel of the present invention.

Since the photoelectric material layer also functions as a color filter, the display device of the present invention can omit the traditional color filter layer.

The display device of the present invention can also include a black matrix, which can be arranged at any suitable position of the display device, including in the photoelectric material layer of the solar cell panel.

The black matrix of the present invention can be made of photoelectrically active materials. When the black matrix is made of photoelectric active materials, its color is no longer conventional black, but its arrangement is the same as that of conventional black matrix. In order to represent its corresponding relationship with the conventional black matrix, the term "black matrix" is still used in the present invention. The black matrix made of photoelectric active material increases the effective area of the photoelectric active material layer and effectively improves the photoelectric conversion capability.

The black matrix can also be made of conductive material coated with insulating glue. The insulating adhesive can be selected from any known adhesive system with excellent insulating performance, preferably but not limited to acrylate system, epoxy system, polyurethane system and the like. The conductive material can be any known conductive metal, preferably but not limited to copper, aluminum, iron, gold, silver and the like.

The third aspect of the present invention relates to the method for preparing the solar cell panel of the present invention, the method comprises the following steps: first forming a layer of transparent electrode layer on the first transparent substrate, then depositing a layer of red photoelectric active material on the transparent electrode layer , and then remove the red photoactive material on the blue unit and the green unit, fill the corresponding positions with the blue and green color resist materials, then cover a layer of hole-conducting material, and finally use a transparent insulating material to form a second transparent substrate.

Preferably, the method for preparing the solar cell panel of the present invention includes the following steps: first forming a layer of transparent electrode layer on the first transparent substrate, then depositing a layer of red photoelectric active material on the transparent electrode layer, and then removing the blue unit and For the red photoelectric active material in the green cell, fill the corresponding position with blue and green color resist materials, then cover a layer of hole-conducting material, then deposit a layer of metal gate, and finally use a transparent insulating material to form a second transparent substrate .

A fourth aspect of the present invention relates to a method of preparing the display device of the present invention, the method comprising the method comprising attaching the solar cell panel of the present invention to a display unit, wherein the solar cell panel and the display unit The bonding surface is the first transparent substrate or the second transparent substrate.

In the present invention, since the solar battery panel is located on the surface of the display unit, the solar battery layer and the display panel layer can be produced separately, which effectively reduces the defect rate in the production process.

Description of drawings

FIG. 1 . A schematic cross-sectional view of a liquid crystal display device with photovoltaic cells in the prior art, where 300 is a photovoltaic cell part.

Figure 2. Schematic diagram of the structure of a common display panel in the prior art,

The layers of the display panel from bottom to top are: lower polarizer, lower glass, electrode, liquid crystal layer, electrode, color filter , upper glass, and upper polarizer.

Fig. 3. A schematic diagram of a top view structure of a color filter in an ordinary display panel in the prior art,

The regions with vertical stripes, diagonal stripes and horizontal stripes represent red, green and blue regions, respectively.

Fig. 4. according to an embodiment of the present invention has the structural representation of the display device of solar cell panel,

The layers of the display device from bottom to top are: lower polarizer, lower glass, electrode, liquid crystal layer, electrode, black matrix , upper glass, upper polarizer, substrate 1, ITO layer, photoactive layer, hole conduction layer, base 2.

Figure 5. A schematic top view of the black matrix in Figure 4.

Figure 6. A schematic top view of the photoelectrically active layer in Figure 4,

The regions with vertical stripes, diagonal stripes and horizontal stripes represent red, green and blue regions, respectively.

Figure 7. Schematic representation of a hybrid heterojunction structure (7A) and an inverted hybrid heterojunction structure (7B) of an organic solar cell.

Fig. 8. Schematic diagram of the preparation process of the solar cell panel of the present invention.

Fig. 9. According to another embodiment of the present invention, a schematic structural view of a display device with a solar cell panel (the black matrix is located on the lower substrate of the display unit),

The layers of the display device from bottom to top are: lower polarizer, lower glass, electrode, black matrix , liquid crystal layer, electrode, upper glass, upper polarizer, substrate 1, ITO layer, photoactive layer, holes Conductive layer, substrate 2.

Fig. 10. According to another embodiment of the present invention, a schematic structural view of a display device with a solar cell panel (the black matrix is located on the upper surface of the lower substrate of the cell panel),

The layers of the display device from bottom to top are: lower polarizer, lower glass, electrode, liquid crystal layer, electrode, upper glass, upper polarizer, substrate 1, black matrix , ITO layer, photoactive layer, hole conduction layer, base 2.

Fig. 11. according to another embodiment of the present invention has the structural representation of the display device of solar panel (contains black matrix in active layer),

The layers of the display device from bottom to top are: lower polarizer, lower glass, electrode, liquid crystal layer, electrode, upper glass, upper polarizer, substrate 1, ITO layer, photoactive layer (including black matrix), empty Hole conduction layer, substrate 2.

Fig. 12. Structural schematic diagram (parallel connection) of solar cell panels according to another embodiment of the present invention,

Wherein the layers from bottom to top are: transparent base layer 2, transparent conductive layer 2 (hole conduction layer), black matrix, transparent conductive layer 1 (transparent electrode layer) and transparent base layer 1; wherein, transparent conductive layer 1 (transparent electrode layer) is continuous, and transparent conductive layer 2 (hole conducting layer) is also continuous.

Figure 13. A schematic structural view of a black matrix of solar panels connected in parallel according to another embodiment of the present invention,

In the figure, 1' is insulating glue, and 2' is conductive material.

Figure 14. Structural schematic diagram (series connection) of solar cell panels according to another embodiment of the present invention,

Wherein the layers from bottom to top are: transparent base layer 2, transparent conductive layer 2 (hole conduction layer), black matrix, transparent conductive layer 1 (transparent electrode layer) and transparent base layer 1; wherein, transparent conductive layer 1 (transparent electrode layer) is discontinuous, and is separated by the insulating spacer located near the black matrix in the transparent conductive layer 1 shown in the figure, and the transparent conductive layer 2 (hole conduction layer) is also discontinuous, and is formed by As shown in the figure, the insulating spacers arranged in the transparent conductive layer 2 and located near the black matrix are separated.

Figure 15. A schematic structural view of a black matrix of solar panels connected in parallel according to another embodiment of the present invention,

1" in the figure is insulating glue, and 2" is conductive material.

Detailed ways

In traditional display devices, color filters are used to filter the backlight to express the corresponding color, but the color filter absorbs 2/3 of the energy of the backlight, and this part of the absorbed energy will be converted into heat or other energy , so that most of the backlight energy is wasted. FIG. 2 is a schematic structural diagram of a common display device, which includes a color filter layer. The color filter layer usually includes a black matrix and a color filter layer. Every three red, green, and blue units (sub-pixels) constitute a pixel and are used to produce different colors. FIG. 3 is a top view of the color filter layer. On the other hand, in existing display devices incorporating solar cells, the solar cells (including those so-called transparent solar cells) are colored. Placing these solar cell layers on a display device will absorb part of the visible light, thereby affecting the display effect.

In the present invention, however, the above-mentioned problems can be solved by integrating a solar cell panel including a photoelectrically active material layer having red-green-blue colors (hereinafter, sometimes simply referred to as the solar cell panel of the present invention) on the display unit.

Specifically, the display device of the present invention includes a display unit and a solar cell panel integrated on the display unit, the solar cell panel includes a photoelectrically active material layer having red-green-blue colors, the photoelectrically active material layer is composed of a red unit , a green unit and a blue unit, wherein the red unit, the green unit and the blue unit are arranged in a manner corresponding to the arrangement of the pixel array in the display unit, and one of the red unit, the green unit and the blue unit or both are made of optoelectronically active materials.

FIG. 4 is a schematic structural view of a display device with a solar panel according to an embodiment of the present invention. As can be seen from the figure, the lower part of the device is the display unit, and the upper part is the solar panel. In the display unit, the color filter layer is removed, leaving only the black matrix. FIG. 5 is a schematic top view of the black matrix of the present invention. FIG. 6 is a schematic top view of the photoelectric active layer of the solar cell panel of the present invention. In Figure 6, the blue unit represented by the area with horizontal stripes and the green unit represented by the area with diagonal stripes correspond to the blue and green sub-pixels of the original color filter, and the color-resisting material is also the same as that of the ordinary filter. The color chip is the same, and the rest is covered by red photoactive material represented by areas with vertical stripes.

This design of the photoelectric active layer is due to the fact that materials with high photoelectric conversion efficiency can absorb most of the blue light and green light in visible light, and are basically transparent to red light, so they can be used as red color filters. However, the conversion efficiency of blue and green photoelectric active materials is generally low, and the color expression is poor, so they are still made of common color resist materials.

Therefore, in the display device of the present invention, the solar cell panel can have the effect of a color filter while generating electricity, so that the color filter layer in the display device can be omitted (eliminating the waste of backlight energy), thereby simplifying the process and saving costs ; And it can overcome the problem that the solar cell absorbs part of the visible light to produce color and affects the display effect.

Each component of the display device of the present invention and its preparation method are described in detail below.

1. Solar panels

The solar cell panel of the present invention is characterized in that: the photoelectric active material layer is a photoelectric active material layer with red-green-blue color composed of red unit, green unit and blue unit, wherein the red unit, green unit and blue unit Arranged in a manner corresponding to the arrangement of the pixel array in the display unit, and one or both of the red unit, the green unit and the blue unit are made of photoelectrically active materials, preferably the red unit is composed of red photoelectrically active materials , the green unit and the blue unit are made of green and blue color-resisting materials, respectively.

In addition, the red unit, green unit and blue unit of the photoelectric active material layer not only cover the position of the red unit, green unit and blue unit of the corresponding ordinary color filter, but also cover the position of the black matrix, thereby increasing the The effective area of the photoelectrically active material layer.

By having the above configuration, only one layer of photoelectric active material can be used to replace the ordinary color filter, so that the display device does not need to additionally include a color filter.

In the present invention, the black matrix used in ordinary color filters can be kept in the display unit, and can also be arranged in the solar panel. When disposed in a solar panel, the black matrix may be located under or within a layer of optoelectronically active material. When the black matrix is arranged in the photoelectric active material layer, the black matrix can be made of a conductive material coated with insulating glue. In the solar cell panel of the present invention, a transparent base layer is provided on both sides of the photoelectric material layer, and a transparent conductive layer can be provided on the side of the transparent base layer facing the photoelectric material layer. As shown in Figures 12 and 13, the conductive material 2' covered by the insulating glue 1' is arranged on two transparent conductive layers (for example, one of the transparent conductive layers can be set as a transparent electrode layer, and the other transparent conductive layer can be set between the hole conduction layer), since the insulating glue 1' isolates the conductive material 2', each solar battery unit exists in a parallel connection. As shown in Figures 14 and 15, the conductive material 2" covered by the insulating glue 1" is arranged between two transparent conductive layers, and several insulating intervals are arranged on the transparent conductive layer near the black matrix. These insulating intervals can be It is formed by removing the transparent conductive material by laser etching or mechanical scribing. Since the insulating glue 1" does not isolate the conductive material 2", each solar cell unit exists in a series connection. As we all know, in circuit design, a larger output voltage can be obtained by setting a series circuit, and a larger output current can also be obtained by setting a parallel circuit. According to actual needs, the design of the solar circuit can be optimized separately or in combination with the methods shown in Fig. 12 and Fig. 14, so as to obtain different output currents and output voltages to meet the needs of different terminal applications.

In order to prevent the opaque metal electrodes from affecting the display effect and light absorption efficiency, it is preferable that the solar cell panel of the present invention adopts an organic solar cell with an inverted structure, that is, an organic solar cell with an inverted hybrid heterojunction structure.

In organic solar cells, two organic semiconductor materials are often used to imitate inorganic heterojunction solar cells, namely, Bilayer organic photovoltaic cells, which is also used in US patent application US2010/0245731 battery structure. The organic semiconductor material as a donor generates hole-electron pairs after absorbing photons, and after the electrons are injected into the organic semiconductor material as an acceptor, the holes and electrons are separated. In this system, the electron donor is p-type, and the electron acceptor is n-type, so that holes and electrons are transported to the two electrodes respectively to form a photocurrent. Compared with silicon semiconductors, the interaction between organic molecules is much weaker. The LUMO (Lowest Unoccupied Molecular Orbital, the lowest unoccupied orbital - the lowest energy level orbital of unoccupied electrons) and HOMO (Highest Unoccupied Molecular Orbital) between different molecules Occupied MolecularOrbital, the highest occupied orbital - the orbital with the highest energy level of the occupied electron) cannot be combined to form a continuous conduction band and valence band in the entire bulk phase. The transport of carriers in organic semiconductors needs to be realized through the "jumping" mechanism of charges between different molecules. The macroscopic performance is that the carrier mobility is much lower than that of inorganic semiconductors. At the same time, when organic small molecules are excited by absorbing photons, they cannot generate free electrons in the conduction band and leave holes in the valence band like silicon semiconductors. Light-excited small organic molecules produce hole-electron pairs that are combined through electrostatic interaction, which is commonly referred to as "exciton". The existence time of excitons is limited, usually below the millisecond level, and the electrons and holes that have not been completely separated will recombine (Recombination) and release the absorbed energy. Obviously, excitons that fail to separate free electrons and holes do not contribute to the photocurrent. Therefore, the efficiency of exciton separation in organic semiconductors has a key impact on the photoelectric conversion efficiency of cells.

As an improvement, a hybrid heterojunction organic solar cell (Bulk heterojunction photovoltaic cells) was proposed. a hybrid film. The excitons generated at any position can reach the interface between the donor and the acceptor (ie, the junction) through a very short path, so that the efficiency of charge separation is improved. At the same time, the positive load carriers formed on the interface can also reach the electrode through a shorter path, thereby making up for the lack of carrier mobility.

The inverted mixed heterojunction structure (the structure used in the present invention) is based on the mixed heterojunction, the position of the hole conduction layer and the heterojunction layer is exchanged, and the conductivity of the hole conduction layer is used to make the cathode The metal electrode layer is omitted, which makes the battery have better light transmission without affecting the conversion efficiency. Figure 7 shows a schematic diagram of a hybrid heterojunction structure (7A) and an inverted hybrid heterojunction structure (7B) of an organic solar cell. A solar cell using an inverted hybrid heterojunction structure can avoid the use of metal electrodes, thereby preventing the opaque metal electrodes from affecting the display effect. On the other hand, the inverted structure can increase the solar cell's absorption of external light, thereby improving the photoelectric conversion efficiency.

As a representative example, the solar cell panel of the present invention includes a first transparent substrate, a transparent electrode layer, the photoelectric active material layer, a hole conducting layer and a second transparent substrate, and these layers are formed from bottom to top with the in order.

As a representative example, the solar cell panel of the present invention includes a first transparent substrate, a transparent electrode layer, the photoelectric active material layer, a hole conducting layer, a metal gate layer and a second transparent substrate, and these layers are formed from the bottom And above in the order stated.

In the solar panel of the present invention, the first and second transparent substrates can be any transparent material, such as glass, PET (polyethylene terephthalate), PEN (polyethylene naphthalate fiber) , PC (polycarbonate), PS (polystyrene), PMMA (polymethyl methacrylate), PETG (ethylene glycol modified - polyethylene terephthalate), AS (acrylonitrile - benzene vinyl resin), BS (butadiene-styrene copolymer), MS (methyl methacrylate-styrene copolymer), MBS (methyl methacrylate-butadiene-styrene copolymer), ABS ( Transparent materials such as acrylonitrile-butadiene-styrene plastic), PP (polypropylene) and PA (polyamide), preferably glass or a flexible substrate such as PET.

The material of the red photoelectric active material layer may be P3HT:PC61BM, P3HT:PC71BM or PCDTBT:PC61BM. P3HT refers to poly(3-hexylthiophene), namely poly(3-hexylthiophene); PC61BM refers to [6,6]-phenyl-C61-butyric acid methyl ester, namely [6,6]-phenyl-C61-butyric acidmethyl ester; P3HT refers to poly(3-hexylthiophene), namely poly(3-hexylthiophene); PC71BM refers to [6,6]-phenyl-C71-butyric acid methyl ester, namely [6,6]-phenyl- C71-butyric acidmethyl ester; PCDTBT refers to poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzo Thiadiazole-4,7-diyl-2,5-thiophenediyl], Poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2 , 1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl]; PC61BM refers to [6,6]-phenyl-C61-butyric acid methyl ester, namely [6,6]-phenyl-C61- butyric acid methyl ester.

The blue color resist material is obtained by dispersing blue dye in resin. The blue dye may be selected from phthalocyanine dyes, azo dyes and anthraquinone dyes, preferably phthalocyanine dyes. The resin may be selected from acrylic resins, epoxy resins and styrene resins, preferably acrylic resins.

Green color resist material is obtained by dispersing green dye in resin. The green dye may be selected from phthalocyanine dyes, azo dyes and anthraquinone dyes, preferably phthalocyanine dyes. The resin may be selected from acrylic resins, epoxy resins and styrene resins, preferably acrylic resins.

The material of the hole conducting layer may be PEDOT:PSS. PEDOT refers to poly(3,4-ethylenedioxythiophene), namely poly(3,4-ethylenedioxythiophene); PSS refers to polystyrene sulfonic acid, namely poly(styrenesulfonate).

The transparent electrode layer can be a layer made of transparent conductive materials such as ITO (indium tin oxide), FTO (fluorine-doped tin oxide), ZnO (zinc oxide), silver nanowire coating, and graphene film.

The metal gate layer may be a gate layer made of materials such as silver, aluminum, copper, and calcium.

2. Display unit

The display unit in the display device of the present invention can be any display unit, including: liquid crystal display unit, electrophoretic display unit, plasma display unit, LED display unit, OLED display unit, CRT display unit and the like. These display units do not contain a color filter, ie, do not contain a color filter consisting of a black matrix and a color filter layer, but may include the black matrix itself.

The present invention is particularly applicable to a display device in which the display unit is a liquid crystal display unit. The liquid crystal display unit includes a transmissive liquid crystal display unit, a transflective liquid crystal display unit, a reflective liquid crystal display unit and the like.

A typical structure of a liquid crystal display unit includes a lower polarizing plate, a lower substrate (glass layer, etc.), a lower electrode layer, a liquid crystal layer, an upper electrode layer, an upper substrate (glass layer, etc.) and an upper polarizing plate stacked in sequence. When the solar cell panel of the present invention is integrated into a liquid crystal display unit, the solar cell panel can be located on the upper polarizer or between the upper substrate and the upper polarizer.

3. The preparation method of the display device of the present invention

In the present invention, since the solar cell panel is integrated above the display unit instead of inside the display unit, the manufacturing method of the display device of the present invention is relatively simple. The pattern of the pattern is aligned with the corresponding position of the black matrix and pasted on the display unit. The bonding surface of the solar battery panel and the display unit is the first transparent substrate or the second transparent substrate.

The production process of the solar cell panel of the present invention is also relatively simple, as shown in FIG. 8 . First prepare an ITO layer on a transparent substrate (which can be a flexible substrate such as glass or PET), then deposit a layer of red photoactive material on the ITO layer, and then remove the blue and green units (sub-pixels) by mask exposure. ) part of the red active material, fill the corresponding positions with blue and green color-resisting materials. It is then covered with a layer of high-conductivity hole-conducting material, and finally encapsulated with a layer of transparent base material.

When assembling the solar panel and the display unit, pay attention to matching the positions of the unit and the black matrix. At the same time, optical glue (such as OCA glue) can be used to bond the two boards to improve the display effect of the device.

In the preparation method of the display device of the present invention, the two base layers of the solar cell panel can be any transparent material such as glass, but it is preferable to use a transparent flexible material (such as a PET substrate), which can be quickly processed in large quantities using roll-to-roll technology. In production, when the battery board is bonded to the display device, the flexible battery board is easier to bond than the rigid battery board such as glass, which can simplify the production process.

As the outermost layer of the solar cell panel, the second transparent substrate can be formed of curable transparent resin (such as ultraviolet curable resin) or other suitable transparent insulating materials to encapsulate and protect the entire cell panel.

In addition, in the process step of removing the red photoelectric active material in the blue unit and the green unit, a mask exposure method can be used.

The transparent electrode layer, the red photoelectric active material layer, the color resist material and the hole conduction material layer are deposited by vacuum deposition or wet deposition method, wherein the wet deposition method includes: spin coating method, spray coating method, flow coating method , inkjet printing, screen printing or roll-to-roll coating.

In the preparation method of the display device of the present invention, the solar cell layer and the display unit can be produced separately, thereby effectively reducing the defect rate in the production process.

Example

The present invention will be described in more detail below by means of examples, which are only exemplary and should not be construed as limiting the scope of the present invention.

Embodiment 1 (the black matrix is positioned at the lower surface of the upper substrate of the display unit)

Preparation of the display unit:

A liquid crystal display unit is prepared as follows, wherein the black matrix is located on the lower surface of the upper substrate of the display unit:

1. Form an ITO lower electrode layer with a TFT (thin film transistor) on the upper surface of the lower glass substrate by etching, sputtering, deposition, etc.;

2. A black matrix is formed on the lower surface of the upper glass substrate by photolithography, and the material of the black matrix is metal chromium;

3. Form the upper electrode layer by sputtering on the lower part of the black matrix, and the electrode material is ITO;

4. Combine the upper and lower substrates to form a liquid crystal cell, in which a liquid crystal layer is formed by vacuum suction;

5. Paste a polarizing film on the lower surface of the lower glass substrate as the lower polarizing plate, and the lower polarizing plate is a composite material composed of polyvinyl alcohol (PVA) stretched film and cellulose acetate film (TAC);

6. Paste a polarizing film on the upper surface of the upper glass substrate as the upper polarizer, and the upper polarizer is a composite material composed of polyvinyl alcohol (PVA) stretched film and cellulose acetate film (TAC). Thus, a display unit 1 was prepared.

Preparation of solar panels:

A PET flexible substrate with a thickness of about 0.75 mm was used as the first transparent substrate. Form an ITO layer with a thickness of about 150 nm on the first substrate by vacuum deposition, and then coat a layer of red photoelectric active material (P3HT: PC61BM, available from Luminescence Technology Corp.) with a thickness of about 200 nm on the ITO layer by spin coating. company's LT-S909 or LT-S905). Then, the red active material at the blue and green unit sites is removed by mask exposure. The blue dye CuPC (available from Luminescence Technology Corp's LT-E201) is dispersed in acrylic resin (available from Changxing Chemical Materials Co., Ltd.'s 6530B-40) to obtain a blue color-resisting material, and the green dye ZnPC ( A green color-resist material can be obtained by dispersing LT-S906 (available from Luminescence Technology Corp) in acrylic resin (optionally available from Changxing Chemical Materials Co., Ltd. 6530B-40). The blue color-resisting material and the green color-resisting material are respectively filled into corresponding positions on the ITO layer by an inkjet printing method. After the dye is dried, a hole-conducting layer (PEDOT:PSS, AI4083 available from Luminescence Technology Corp) with a thickness of about 25 nm is formed by spin coating. A silver gate layer is deposited on the hole conducting layer by thermal deposition. Finally, the solar cell panel 1 is prepared by packaging with a PET film (3mil, 3M) produced by 3M Company.

Integration of display unit with solar panel

Place the solar cell panel 1 above the display unit 1 so that the pattern of the red-blue-green unit on the solar cell panel 1 is aligned with the corresponding position of the black matrix in the display unit 1, and use OCA (8172 optical glue, which can be purchased from 3M Obtained) by bonding the two together, a display device 1 having a structure similar to that shown in FIG. 4 can be obtained.

Embodiment 2 (the black matrix is located on the upper surface of the lower substrate electrode of the display unit)

A display unit was prepared in a similar manner to Example 1, except that a black matrix was formed on the upper surface of the lower substrate electrode of the display unit, and a display unit 2 was obtained.

The display unit 2 and the solar panel 1 are integrated in a manner similar to that of the embodiment 1 to obtain a display device 2 having a structure similar to that shown in FIG. 9 .

Embodiment 3 (black matrix is positioned at the upper surface of the first substrate of solar panel)

A display unit and a solar battery panel were prepared in a manner similar to that of Example 1, but the black matrix forming step was omitted during the preparation of the display unit, and during the preparation of the solar battery panel, a black matrix was first formed on the first substrate, Then an ITO layer is formed to obtain the display unit 3 and the solar cell panel 2 .

The display unit 3 and the solar panel 2 are integrated in a manner similar to that of Embodiment 1 to obtain a display device 3 having a structure similar to that shown in FIG. 10 .

Embodiment 4 (black matrix is positioned at the photoelectric active material layer of solar panel)

A display unit and a solar cell panel were prepared in a manner similar to that of Example 3, but a black matrix was formed in the photoelectric active material layer to obtain a solar cell panel 3 .

The display unit 3 and the solar panel 3 are integrated in a manner similar to that of the embodiment 1 to obtain a display device 4 having a structure similar to that shown in FIG. 11 .

Embodiment 5 (black matrix is positioned at the photoelectric active material layer of solar panel)

A display unit and a solar panel are prepared in a manner similar to that of Example 4, and a black matrix (as shown in Figure 13) is formed in the photoelectric active material layer. As shown in Figure 12, the entire solar cell exists in a parallel connection to obtain solar energy. battery board4.

The display unit 3 and the solar panel 4 are integrated in a manner similar to that of the embodiment 1 to obtain a display device 5 having a structure similar to that shown in FIG. 11 .

Embodiment 6 (black matrix is located in the photoelectric active material layer of solar cell panel)

A display unit and a solar panel are prepared in a manner similar to Example 4, and a black matrix (as shown in Figure 15) is formed in the photoelectric active material layer. As shown in Figure 14, the entire solar cell exists in a series connection to obtain solar energy. Battery board 5.

The display unit 3 and the solar panel 5 are integrated in a manner similar to that of the embodiment 1 to obtain a display device 6 having a structure similar to that shown in FIG. 11 .

Embodiment 7 (black matrix is positioned at the photoelectric active material layer of solar panel)

A display unit and a solar cell panel are prepared in a manner similar to that of Example 4, and a black matrix is formed in the photoelectric active material layer. According to actual needs, the series-parallel design of the entire solar circuit is optimized in combination with the method of Fig. 12 and Fig. 14 to obtain solar energy battery board6.

The display unit 3 and the solar panel 6 are integrated in a manner similar to that of the embodiment 1 to obtain a display device 7 having a structure similar to that shown in FIG. 11 .

Comparative example 1

Prepare the display device in a manner similar to Example 1, but in the photoelectric active material layer of the solar cell panel, use blue photoelectric active material CuPc:BCP (CuPc refers to copper phthalocyanine, i.e. phthalocyanine copper complex, optional from Luminescence Technology Corp company purchased LT-E201; BCP refers to bathocuproline, i.e. 2,9-Dimethyl-4,7-diphenyl-1,10-phenanhroline, optional LT-E304 purchased from Luminescence Technology Corp company) and Green photoelectric active material ZnPc:BCP (ZnPc refers to zinc phthalocyanine, i.e. zinc phthalocyanine, optional LT-S906 purchased from Luminescence Technology Corp; BCP refers to bathocuproine, i.e. 2,9-Dimethyl-4,7 -diphenyl-1, 10-phenanhroline, optional LT-E304 purchased from Luminescence Technology Corp) instead of blue and green photoresist materials, to obtain a comparative display device C1. The display effect of the display device C1 is poor, and its color expression is obviously lower than that of the display devices provided in the above-mentioned embodiments 1-7.

Industrial Applicability

The display device with integrated solar cell panel of the present invention can omit the traditional color filter, and the integrated solar cell panel can also absorb some unnecessary backlight and light entering the display device from the outside while performing color filtering. Ambient light is converted into electrical energy, thereby greatly reducing the battery capacity of mobile devices. As a result, not only the weight of the device can be reduced, but also it does not affect or can obtain higher battery life. The display device integrated with solar panels of the present invention can be applied in various environments, such as outdoor electronic billboards and other equipment, so that the electronic billboards can be placed and used in places where power supply is not convenient, such as in the wild.

Claims (35)

1. be integrated in the solar panel on display unit, described solar panel comprises:

One has the photoelectric material layer of R-G-B color,

Described photoelectric material layer comprises red units, green cell and blue cell,

Wherein said red units, green cell and blue cell are arranged in the mode corresponding with pel array arrangement mode in described display unit, and

One or both in described red units, green cell and blue cell are made up of photoelectric activity material.

2. solar panel according to claim 1, wherein, described solar panel is integrated on the surface of display unit.

3. solar panel according to claim 1, wherein, described red units is made up of photoelectric activity material.

4. solar panel according to claim 1, wherein, described red units is made up of one or more materials in following group: P3HT:PC61BM (poly-3-hexyl thiophene: poly-[6, 6]-phenyl-C61-methyl butyrate), P3HT:PC70BM (poly-3-hexyl thiophene: poly-[6, 6]-phenyl-C71-methyl butyrate), and PCDTBT:PC61BM (poly-[[9-(1-octyl group nonyl)-9H-carbazole-2, 7-bis-bases]-2, 5-thiophene two base-2, 1, 3-diazosulfide-4, 7-bis-base-2, 5-thiophene two bases]: poly-[6, 6]-phenyl-C61-methyl butyrate).

5. solar panel according to claim 1, wherein, described solar panel also comprises a first transparent substrates layer and a second transparent substrates layer, and described the first transparent substrates layer and described the second transparent substrates layer are arranged at respectively the both sides of photoelectric material layer.

6. solar panel according to claim 5, wherein, described the first hyaline layer and described the second hyaline layer are that one or more materials that are selected from following group are made: glass, PET, PEN, PC, PS, PMMA, PETG, AS, BS, MS, MBS, ABS, PP and PA.

7. solar panel according to claim 5, wherein, described solar panel also comprises a transparent electrode layer, described transparent electrode layer is arranged between described the first transparent substrates layer and described photoelectric material layer.

8. solar panel according to claim 7, wherein, described transparent electrode layer is to be selected from one or more in following group: ITO layer, FTO layer, ZnO layer, nano silver wire coating and graphene film.

9. solar panel according to claim 5, wherein, described solar panel also comprises a hole-conductive layer, described hole-conductive layer is arranged between described the second transparent substrates layer and described photoelectric material layer.

10. solar panel according to claim 9, wherein, described hole-conductive layer is made up of following material: PEDOT:PSS (poly-3,4-ethylene dioxythiophene: polystyrolsulfon acid).

11. solar panels according to claim 9, wherein, described solar panel also comprises a metal gate layers, described metal gate layers is arranged between described hole-conductive layer and described the second transparent substrates layer, with described red units, green cell and blue cell between position corresponding to borderline phase.

12. solar panels according to claim 11, wherein, described metal gate layers is that one or more materials that are selected from following group are made: silver, aluminium, copper and calcium.

13. solar panels according to claim 1, wherein, described solar panel has reversion mixed heterojunction structure.

14. solar panels according to claim 5, wherein, described solar panel also comprises a black matrix".

15. solar panels according to claim 14, wherein, described black matrix" is arranged in described photoelectric material layer.

16. solar panels according to claim 15, wherein, described black matrix" is made up of photoelectric activity material.

17. solar panels according to claim 15, wherein, the conductive material that described black matrix" is coated by insulating cement is made.

18. solar panels according to claim 17, wherein, described insulating cement is selected from acrylatcs systems, epoxy systems, polyurethane system adhesive.

19. solar panels according to claim 17, wherein, described conductive material is conductive metal.

20. solar panels according to claim 17, wherein, in described solar panel, the connected mode of solar cell device is in parallel, series connection or series and parallel combination.

21. 1 kinds of solar panels that are integrated on display unit, described solar panel comprises:

One has the photoelectric material layer of R-G-B color, described photoelectric material layer comprises red units, green cell and blue cell, wherein said red units, green cell and blue cell are arranged in the mode corresponding with pel array arrangement mode in described display unit, and described red units is made up of photoelectric activity material;

A first transparent substrates layer and a second transparent substrates layer, described the first transparent substrates layer and described the second transparent substrates layer are arranged at respectively the both sides of photoelectric material layer;

A transparent electrode layer, described transparent electrode layer is arranged between described the first transparent substrates layer and described photoelectric material layer;

A hole-conductive layer, described hole-conductive layer is arranged between described the second transparent substrates layer and described photoelectric material layer.

22. solar panels according to claim 21, wherein, described solar panel comprises: a metal gate layers, described metal gate layers is arranged between described hole-conductive layer and described the second transparent substrates layer, with described red units, green cell and blue cell between position corresponding to borderline phase.

23. 1 kinds of display unit, comprise a display unit and a solar panel as described in any one in claim 1-22.

24. display unit according to claim 23, wherein, described display unit is liquid crystal display, electrophoresis-type display unit, interference modulations formula (IMOD) display unit, electric infiltration type display unit, plasma display unit, LED display unit, OLED display unit or CRT display unit.

25. display unit according to claim 24, wherein, described liquid crystal display is Transmitting liquid crystal device unit, Transflective liquid crystal display or reflection type liquid crystal display unit.

26. display unit according to claim 25, wherein, described liquid crystal display comprises the lower polarizer, lower-glass layer, lower electrode layer, liquid crystal layer, upper electrode layer, upper glass layer and the upper polarizer that stack gradually.

27. display unit according to claim 26, wherein, described solar panel is arranged on upper polarizer or between upper glass layer and upper polarizer.

28. display unit according to claim 23, wherein, described display unit comprises a black matrix" being arranged in described display unit.

Prepare the method for solar panel as claimed in claim 21 for 29. 1 kinds, comprise the following steps: first in the first transparent substrates, form layer of transparent electrode layer, then on transparent electrode layer, deposit one deck red light electroactive material, then remove the red light electroactive material at blue cell and green cell position, blueness and green color blocking material are inserted to corresponding position, then cover one deck hole-conductive material, finally form the second transparent substrates with transparent insulation material.

Prepare the method for solar panel as claimed in claim 22 for 30. 1 kinds, comprise the following steps: first in the first transparent substrates, form layer of transparent electrode layer, then on transparent electrode layer, deposit one deck red light electroactive material, then remove the red light electroactive material at blue cell and green cell position, blueness and green color blocking material are inserted to corresponding position, then cover one deck hole-conductive material, then deposit layer of metal grid, finally form the second transparent substrates with transparent insulation material.

31. according to the method described in claim 29 or 30, and the red light electroactive material of wherein removing blue cell and green cell position is to be undertaken by the method for mask exposure.

32. according to the method described in claim 29 or 30, and wherein transparent electrode layer, red light electroactive material layer, color blocking material and hole-conductive material layer deposit and form by vacuum moulding machine or wet method sedimentation.

33. methods according to claim 32, wherein said wet method deposition comprises: spin-coating method, spraying process, flow coat method, ink-jet printing process, silk screen print method or volume to volume rubbing method.

Prepare the method for the display unit described in claim 23 for 34. 1 kinds, described method comprises and will fit on display unit according to the solar panel described in any one in claim 1-22, and the binding face of wherein said solar panel and described display unit is the first transparent substrates layer or the second transparent substrates layer.

35. methods according to claim 34, wherein said laminating is undertaken by bonding.